You're conflating two of the many horrible things that happened in the Trump years. First was Kushner getting $2 billion dollars for selling Saudi prince Mohammed bin Salman the "names of Saudis disloyal to the crown prince." Those people were of course all subsequently arrested by the prince.

The second was that, after Trumps reckless handling of top secret information, the CIA sent out a cable to all their offices informing them of the loss of an unusually high number of human assets. While there is no proof Trump and co. sold or leaked classified information, I personally am confident that even if he didn't sell the information, his carelessness is almost certainly the cause of at least some portion of those deaths. The following are some excerpts from the Cornell Policy Review - The Executive Records Recovered from Mar-a-Lago and the C.I.A.’s Missing Informants(PDF). The whole thing is worth a read if you're interested.

In October 2021, almost a year prior to the Mar-a-Lago search, The New York Times reported that the C.I.A. had disclosed, within a top-secret C.I.A. cable, that an unusually high number of foreign citizens serving as U.S. government informants had been killed, arrested, or compromised by rival intelligence agencies. The C.I.A. admitted it had no concrete evidence as to why this was happening, and could only point to internal measures like “poor tradecraft; being too trusting of sources; underestimating foreign intelligence agencies and moving too quickly to recruit informants.” There may be more information about why this was occurring, and the F.B.I. document seizure at Mar-a-Lago in August 2022 suggests a possible explanation.

The New York Times reported that the D.O.J. search of Mar-a-Lago was instigated by the discovery of highly classified material related to “clandestine human sources.” This was confirmed by the F.B.I. affidavit from Mar-a-Lago, alluding that the documents contained information on the C.I.A.’s Human Intelligence Control System (HCS), a system designed to protect intelligence information derived from clandestine human sources. The HCS intelligence documents contain details about the sources of the information–informants themselves. In some cases these details are general, such as if an unidentified clandestine source has direct or secondary intelligence knowledge. In others, these details are more descriptive and could provide identifiable information. The New York Times states the documents retrieved from Mar-a-Lago in January 2021 included some files demarcated as HCS information which could possibly identify C.I.A. informants. Protection of these informants’ information is why the C.I.A. and the intelligence community may have originally sought control over the HCS intelligence documents as soon as Donald Trump left office, then had the N.A.R.A. refer the DOJ to recoup this top-secret, national information.

Though it is uncertain if foreign intelligence ever accessed these documents, media reports indicate one possible occurrence in Inna Yashchyshyn. In May 2021, Yashchyshyn successfully posed as a member of the Rothschild family to gain access to Mar-a-Lago. At that time, the F.B.I. reported that Yashchyshyn hoped to make Trump family connections and raise money. Little is known about Inna Yashchyshyn other than that she is a Russian-speaking Ukrainian immigrant who used a fake identity to gain access to and build relationships with several U.S. politicians, including Donald Trump. Her link to any foreign government agency is unknown; however, two truths remain: (1) she is closely linked to a Moscow-raised businessman named Valeriy Tarasenko (who provided the F.B.I. with her motivations and actual identity during a deposition), and (2) she used a fake alias to gain special access into Mar-a-Lago.

$3 Billion, specifically. And I don't remember the time frame in relation, but a bunch of American spies wound up dead as well.